解釋Iron為何比Magnesium更活躍

It is impossible!

Magnesium is more reactive than iron. It is because iron is transition metal. It is more stable than alkali earth metals.

Reason: Alkali earth metal(magnesium)'s outer shell has only 2 electrons. But iron has 8.The electrons on outer shell is fewer, the atom is more reactive.

The order in reactivity (desending):

alkali metals>alkali earth metals >transition metal >p-block elements>halogens>noble gases

你條問題有問題!
Your question have question ! (you say use engilish would be the best)

No, Magnesium is more active, Mg2+. If u put Mg into the water, it will dissolve very fast with burning fire. But, if you put the Iron, Fe2+, into the water, it only sink tothe bottom and it needs longer time to react with the water to get rust!!

In the periodic table, It shows that Magnesium is a very active atom.

咩啊.. mg is more reactive than iron 啊@@

2010-03-23 22:54:58 補充：
好似係佢d magnesium d neutro 有d唔之咩problem

2010-03-23 22:55:08 補充：
neutron

You are wrong , it is magnesium more reactive than iron . Please refer to the reactivity series---K , Na , Ca , Mg(magnesium) , Al , Zn , than Fe(iron) ,....& etc. According to series magnesium is more reactive than iron .Refer to the periodic table , the most reactive metal is K(potassium) which is in the top of the first column from the left , Mg is in the mid of second column but iron is even further from the left of the transition metal.